package ynu.edu.online_course.service;

import ynu.edu.online_course.entity.UserExtension;

public interface UserExtensionService {
    UserExtension getExtensionByUserId(Long userId);
    void addUserExtension(UserExtension userExtension);
    void updateUserExtension(UserExtension userExtension);
    void incrementCourseCount(Long userId);
    void decrementCourseCount(Long userId);
}
